Reachable Assertion Affecting github.com/quic-go/quic-go package, versions <0.49.1>=0.50.0 <0.54.1
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Test your applications- Snyk IDSNYK-GOLANG-GITHUBCOMQUICGOQUICGO-13521968
- published10 Oct 2025
- disclosed10 Oct 2025
- creditrsukhodolskyi
Introduced: 10 Oct 2025
NewCVE-2025-59530 Â (opens in a new tab)Common Vulnerabilities and Exposures (CVE) are common identifiers for publicly known security vulnerabilities
Common Weakness Enumeration (CWE) is a category system for software weaknesses
How to fix?
Upgrade github.com/quic-go/quic-go to version 0.49.1, 0.54.1 or higher.
Overview
Affected versions of this package are vulnerable to Reachable Assertion in the handshake phase. An attacker can cause the client to crash by sending a premature HANDSHAKE_DONE frame from a misbehaving or malicious server, which can cause a denial-of-service.